"We like to keep the base piece (the rectangle) intact for accuracy, so trim to 1/4" on the B patch (the square) only. This is sometimes called a sew-and-fold corner. Repeat for the other side."
So I took that to mean that I should fold both the rectangle and the square back, and cut just the middle triangle. Get it?
My question is this: how does that help for accuracy? Is this the usual way to make a flying geese block? Maybe I've been doing it wrong? What say you, oh wise ones?
If you do not cut away the original rectangle, you do not lose the integrity of the block. The only problem you will have with this is when the rectangle is dark and the triangle is light. The result is a shadow of the dark showing through.